[Hotword] Making enabling/disabling the setting enable/disable the hotword extension.

chrome/browser/search/hotword_service_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/search/hotword_service.h"
 #include "chrome/browser/search/hotword_service_factory.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_profile.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class HotwordServiceTest : public testing::Test {
  protected:
   HotwordServiceTest() : field_trial_list_(NULL) {}
   virtual ~HotwordServiceTest() {}
 
   void SetApplicationLocale(Profile* profile, const std::string& new_locale) {
 #if defined(OS_CHROMEOS)
         // On ChromeOS locale is per-profile.
     profile->GetPrefs()->SetString(prefs::kApplicationLocale, new_locale);
 #else
     g_browser_process->SetApplicationLocale(new_locale);
 #endif
   }
 
  private:
   base::FieldTrialList field_trial_list_;
+  content::TestBrowserThreadBundle thread_bundle_;
 };
 
 TEST_F(HotwordServiceTest, ShouldShowOptInPopup) {
   TestingProfile::Builder profile_builder;
   TestingProfile::Builder otr_profile_builder;
   otr_profile_builder.SetIncognito();
   scoped_ptr<TestingProfile> profile = profile_builder.Build();
   scoped_ptr<TestingProfile> otr_profile = otr_profile_builder.Build();
 
   // Popup should not be shown for incognito profiles.
@@ skipping 102 matching lines @@
   SetApplicationLocale(static_cast<Profile*>(profile.get()), "en-US");
   EXPECT_TRUE(HotwordServiceFactory::IsHotwordAllowed(profile.get()));
   SetApplicationLocale(static_cast<Profile*>(profile.get()), "en_us");
   EXPECT_TRUE(HotwordServiceFactory::IsHotwordAllowed(profile.get()));
 
   // Test that incognito even with a valid locale and valid field trial
   // still returns false.
   SetApplicationLocale(static_cast<Profile*>(otr_profile.get()), "en");
   EXPECT_FALSE(HotwordServiceFactory::IsHotwordAllowed(otr_profile.get()));
 }